1
2/*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8#include "SampleCode.h"
9#include "SkView.h"
10#include "SkCanvas.h"
11#include "SkGradientShader.h"
12#include "SkPath.h"
13#include "SkRegion.h"
14#include "SkShader.h"
15#include "SkUtils.h"
16#include "SkComposeShader.h"
17#include "Sk1DPathEffect.h"
18#include "SkCornerPathEffect.h"
19#include "SkPathMeasure.h"
20#include "SkRandom.h"
21#include "SkColorPriv.h"
22#include "SkColorFilter.h"
23#include "SkLayerRasterizer.h"
24
25#include "SkParsePath.h"
26static void testparse() {
27    SkRect r;
28    r.set(0, 0, SkFloatToScalar(10), SkFloatToScalar(10.5));
29    SkPath p, p2;
30    SkString str, str2;
31
32    p.addRect(r);
33    SkParsePath::ToSVGString(p, &str);
34    SkParsePath::FromSVGString(str.c_str(), &p2);
35    SkParsePath::ToSVGString(p2, &str2);
36}
37
38class ArcsView : public SampleView {
39public:
40	ArcsView() {
41        testparse();
42        fSweep = SkIntToScalar(100);
43        this->setBGColor(0xFFDDDDDD);
44    }
45
46protected:
47    // overrides from SkEventSink
48    virtual bool onQuery(SkEvent* evt) {
49        if (SampleCode::TitleQ(*evt)) {
50            SampleCode::TitleR(evt, "Arcs");
51            return true;
52        }
53        return this->INHERITED::onQuery(evt);
54    }
55
56    static void drawRectWithLines(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
57        canvas->drawRect(r, p);
58        canvas->drawLine(r.fLeft, r.fTop, r.fRight, r.fBottom, p);
59        canvas->drawLine(r.fLeft, r.fBottom, r.fRight, r.fTop, p);
60        canvas->drawLine(r.fLeft, r.centerY(), r.fRight, r.centerY(), p);
61        canvas->drawLine(r.centerX(), r.fTop, r.centerX(), r.fBottom, p);
62    }
63
64    static void draw_label(SkCanvas* canvas, const SkRect& rect,
65                            int start, int sweep) {
66        SkPaint paint;
67
68        paint.setAntiAlias(true);
69        paint.setTextAlign(SkPaint::kCenter_Align);
70
71        SkString    str;
72
73        str.appendS32(start);
74        str.append(", ");
75        str.appendS32(sweep);
76        canvas->drawText(str.c_str(), str.size(), rect.centerX(),
77                         rect.fBottom + paint.getTextSize() * 5/4, paint);
78    }
79
80    static void drawArcs(SkCanvas* canvas) {
81        SkPaint paint;
82        SkRect  r;
83        SkScalar w = SkIntToScalar(75);
84        SkScalar h = SkIntToScalar(50);
85
86        r.set(0, 0, w, h);
87        paint.setAntiAlias(true);
88        paint.setStyle(SkPaint::kStroke_Style);
89
90        canvas->save();
91        canvas->translate(SkIntToScalar(10), SkIntToScalar(300));
92
93        paint.setStrokeWidth(SkIntToScalar(1));
94
95        static const int gAngles[] = {
96            0, 360,
97            0, 45,
98            0, -45,
99            720, 135,
100            -90, 269,
101            -90, 270,
102            -90, 271,
103            -180, -270,
104            225, 90
105        };
106
107        for (size_t i = 0; i < SK_ARRAY_COUNT(gAngles); i += 2) {
108            paint.setColor(SK_ColorBLACK);
109            drawRectWithLines(canvas, r, paint);
110
111            paint.setColor(SK_ColorRED);
112            canvas->drawArc(r, SkIntToScalar(gAngles[i]),
113                            SkIntToScalar(gAngles[i+1]), false, paint);
114
115            draw_label(canvas, r, gAngles[i], gAngles[i+1]);
116
117            canvas->translate(w * 8 / 7, 0);
118        }
119
120        canvas->restore();
121    }
122
123    virtual void onDrawContent(SkCanvas* canvas) {
124        fSweep = SampleCode::GetAnimScalar(SkIntToScalar(360)/24,
125                                           SkIntToScalar(360));
126//        fSweep = SkFloatToScalar(359.99f);
127
128        SkRect  r;
129        SkPaint paint;
130
131        paint.setAntiAlias(true);
132        paint.setStrokeWidth(SkIntToScalar(2));
133        paint.setStyle(SkPaint::kStroke_Style);
134
135        r.set(0, 0, SkIntToScalar(200), SkIntToScalar(200));
136        r.offset(SkIntToScalar(20), SkIntToScalar(20));
137
138        if (false) {
139            const SkScalar d = SkIntToScalar(3);
140            const SkScalar rad[] = { d, d, d, d, d, d, d, d };
141            SkPath path;
142            path.addRoundRect(r, rad);
143            canvas->drawPath(path, paint);
144            return;
145        }
146
147        drawRectWithLines(canvas, r, paint);
148
149   //     printf("----- sweep %g %X\n", SkScalarToFloat(fSweep), SkDegreesToRadians(fSweep));
150
151
152        paint.setStyle(SkPaint::kFill_Style);
153        paint.setColor(0x800000FF);
154        canvas->drawArc(r, 0, fSweep, true, paint);
155
156        paint.setColor(0x800FF000);
157        canvas->drawArc(r, 0, fSweep, false, paint);
158
159        paint.setStyle(SkPaint::kStroke_Style);
160        paint.setColor(SK_ColorRED);
161        canvas->drawArc(r, 0, fSweep, true, paint);
162
163        paint.setStrokeWidth(0);
164        paint.setColor(SK_ColorBLUE);
165        canvas->drawArc(r, 0, fSweep, false, paint);
166
167        drawArcs(canvas);
168        this->inval(NULL);
169    }
170
171    virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) {
172     //   fSweep += SK_Scalar1;
173        this->inval(NULL);
174        return this->INHERITED::onFindClickHandler(x, y);
175    }
176
177    virtual bool onClick(Click* click) {
178        return this->INHERITED::onClick(click);
179    }
180
181private:
182    SkScalar fSweep;
183
184    typedef SampleView INHERITED;
185};
186
187//////////////////////////////////////////////////////////////////////////////
188
189static SkView* MyFactory() { return new ArcsView; }
190static SkViewRegister reg(MyFactory);
191
192